1988-08-17
1990-01-02
Joyce, Harold
98 4011, 981151, F24F 900
Patent
active
048905445
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns an air distribution system for distributing air downward from above at very low velocity, and said air distribution system comprising an air distribution terminal means.
Such air distribution systems are known in prior art in which the air is guided from a terminal means individually to different working places so that the air discharging from the terminal means encounters the person present in the staying area. It is however a fact that the air supply produces a sensation of draught and thus renders ventilation undesirable. It is also a fact that the worker himself has no access to the control of the air entering his staying area.
SUMMARY OF THE INVENTION
The object of the invention is an air distribution system of completely novel kind, in which the drawbacks of conventional interior air replacement ventilation have been successfully avoided and in which air distribution to individual working places has been successfully implemented, whereby the air distribution event is also controllable by action of the person working at the respective working place. The object of the invention is specifically an improvement of air distribution.
The system of the invention is mainly characterized in that the air distribution system comprises an air distribution terminal means from which the air has been arranged to descend substantially merely by gravity effect at very low velocity, and that the desired velocity of descent of the air descending from the terminal means has been achieved by producing a temperature differential between the room air and the air that is conducted from the air distribution terminal means.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is more closely described in the following, referring to certain advantageous embodiments of the invention, presented in the accompanying drawings. The invention however is not being meant to be exclusively confined to said embodiments.
FIG. 1, the air distribution system of the invention is schematically presented by showing an air distribution means design conforming to the invention;
FIG. 2A illustrates another structural design of the air distribution means of the invention, in axonometric perspective;
FIG. 2B illustrates an advantageous embodiment of the air discharge surface;
FIG. 3 is a schematic presentation of a principle embodiment of the air distribution system of the invention;
FIG. 4 illustrates the floor plan of a room, and the stations of the working place-individual air distribution means have been shown in this figure. As taught by the invention, each working place-individual low-velocity ventilation means can be regulated. The air descent patterns associated with each air distribution terminal means have been indicated in the figure;
FIG. 5 schematically illustrates an embodiment of the ventilation according to the invention wherein the air distribution means has been disposed to produce a descending air mass in conjunction with a place assigned for welding work;
FIG. 6 schematically illustrates a control principle for the air distribution system of the invention;
FIG. 7A illustrates another control system for the air distribution system of the invention;
FIG. 7B illustrates, in a cross section diagram, the plate of FIG. 7A, installed in the housing structure of the air distribution terminal means;
FIG. 8 illustrates another air distribution terminal means according to the invention. The means is shown, in this projection, partly cut open to reveal the control elements inside the means;
FIG. 9 illustrates, in axonometric perspective, another advantageous embodiment of the perforated plate associated with the air distribution terminal member. The significance in the air distribution event of the curtain flow apertures is schematically indicated in this embodiment;
FIG. 10A illustrates, in cross section, the air distribution terminal member of FIG. 1, the section being carried along the line I--I and one adjustment being shown;
FIG. 10B illustrates another position of the control member
REFERENCES:
patent: 3776121 (1973-12-01), Truhan
patent: 4055112 (1977-10-01), Larfeldt
patent: 4164173 (1979-08-01), Douglas
Halton Produktblad, pp. 4.1.1-4.1.2, issued May 1986 (Taby), "Luftspridare THA".
Flakt Katalog, issued Jun. 1983, acc. nr. 434/83, "Luftridatak" (Taby), E46 pp. 1-4.
Halton Produktblad, pp. 8.1.1-8.1.3, issued Nov. 1986, "Lagimpulsdon LVA".
Aalto Erkki
Eloranta Jouko
Pellinen Teuvo
Halton Oy
Joyce Harold
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